A man lies dead in a park in Peterborough. The position of his body raises intense suspicions but rigor mortis has already set in and the trail of evidence is going cold. Who is the victim and how did he come to be dumped overnight in open ground? Detectives are called in to investigate. Cameras follow every extraordinary twist and turn of the investigation as the job of working out this real whodunnit becomes the priority for the Major Crime Unit. Bafta Award-nominated 24 Hours in Police Custody follows Bedfordshire, Cambridgeshire and Hertfordshire Police's detective work around the clock in forensic detail as officers race against time to investigate major crimes, disentangle evidence and build a case, which they then put to their suspects in interview. This is real-life crime drama at its most intense.